In the Linux kernel, the following vulnerability has been resolved:
timekeeping: Adjust the leap state for the correct auxiliary timekeeper
When __do_ajdtimex() was introduced to handle adjtimex for any timekeeper, this reference to tk_core was not updated. When called on an auxiliary timekeeper, the core timekeeper would be updated incorrectly.
This gets caught by the lock debugging diagnostics because the timekeepers sequence lock gets written to without holding its associated spinlock:
WARNING: include/linux/seqlock.h:226 at __do_adjtimex+0x394/0x3b0, CPU#2: test/125 aux_clock_adj (kernel/time/timekeeping.c:2979) __do_sys_clock_adjtime (kernel/time/posix-timers.c:1161 kernel/time/posix-timers.c:1173) do_syscall_64 (arch/x86/entry/syscall_64.c:63 (discriminator 1) arch/x86/entry/syscall_64.c:94 (discriminator 1)) entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:131)
Update the correct auxiliary timekeeper.
CVSS Details
- CVSS 3.1 Base Score: 5.5
- CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Redhat_linux | — | No solution exists | Jul 17, 2026 | Feb 4, 2026 |
| Ubuntu | — | Upgrade linux-image-gcp-64kUpgrade linux-image-nvidia-hwe-24.04Upgrade linux-image-gcpUpgrade linux-image-oem-24.04cUpgrade linux-image-6.17.0-1018-realtimeUpgrade linux-image-6.17.0-1018-azure-fdeUpgrade linux-image-6.17.0-1030-oemUpgrade linux-image-oem-24.04aUpgrade linux-image-6.17.0-1019-oracle-64kUpgrade linux-image-6.17.0-1021-gcpUpgrade linux-image-realtime-hwe-24.04Upgrade linux-image-oem-24.04dUpgrade linux-image-realtime-6.17Upgrade linux-image-6.17.0-1021-gcp-64kUpgrade linux-image-azureUpgrade linux-image-azure-6.17Upgrade linux-image-oracle-64kUpgrade linux-image-nvidia-64k-hwe-24.04Upgrade linux-image-oem-24.04Upgrade linux-image-oracle-6.17Upgrade linux-image-oracle-64k-6.17Upgrade linux-image-6.17.0-1031-nvidiaUpgrade linux-image-6.17.0-1019-oracleUpgrade linux-image-oem-24.04bUpgrade linux-image-6.17.0-1031-nvidia-64kUpgrade linux-image-oracleUpgrade linux-image-gcp-6.17Upgrade linux-image-azure-fde-6.17Upgrade linux-image-nvidia-6.17Upgrade linux-image-azure-fdeUpgrade linux-image-6.17.0-1021-azureUpgrade linux-image-oem-6.17Upgrade linux-image-nvidia-64k-6.17Upgrade linux-image-gcp-64k-6.17 | Jul 21, 2026 | Jul 20, 2026 |
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